播放2.1.4 java.lang.AbstractMethodError：

我的项目以前运行良好，但昨天在清理项目并再次运行后，发现以下错误消息：

[error] application - 

! @6g0a10lp6 - Internal server error, for (GET) [/] ->

play.api.Application$$anon$1: Execution exception[[RuntimeException: java.lang.AbstractMethodError: play.mvc.Action.call(Lplay/mvc/Http$Context;)Lplay/mvc/Result;]]
    at play.api.Application$class.handleError(Application.scala:287) ~[play_2.10.jar:2.1.4]
    at play.api.DefaultApplication.handleError(Application.scala:381) [play_2.10.jar:2.1.4]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$play$core$server$netty$PlayDefaultUpstreamHandler$$handle$1$1.apply(PlayDefaultUpstreamHandler.scala:143) [play_2.10.jar:2.1.4]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$play$core$server$netty$PlayDefaultUpstreamHandler$$handle$1$1.apply(PlayDefaultUpstreamHandler.scala:139) [play_2.10.jar:2.1.4]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) [play_2.10.jar:2.1.4]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) [play_2.10.jar:2.1.4]
java.lang.RuntimeException: java.lang.AbstractMethodError: play.mvc.Action.call(Lplay/mvc/Http$Context;)Lplay/mvc/Result;
    at play.libs.F$Promise$6.apply(F.java:401) ~[play_2.10.jar:2.1.4]
    at scala.concurrent.Future$$anonfun$map$1.liftedTree2$1(Future.scala:253) ~[scala-library.jar:na]
    at scala.concurrent.Future$$anonfun$map$1.apply(Future.scala:249) ~[scala-library.jar:na]
    at scala.concurrent.Future$$anonfun$map$1.apply(Future.scala:249) ~[scala-library.jar:na]
    at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:29) ~[scala-library.jar:na]
    at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.processBatch$1(BatchingExecutor.scala:67) ~[akka-actor_2.10-2.2.0.jar:2.2.0]
Caused by: java.lang.AbstractMethodError: play.mvc.Action.call(Lplay/mvc/Http$Context;)Lplay/mvc/Result;
    at play.core.j.JavaAction$$anon$2.apply(JavaAction.scala:80) ~[play_2.10.jar:2.1.4]
    at play.core.j.JavaAction$$anon$2.apply(JavaAction.scala:79) ~[play_2.10.jar:2.1.4]
    at play.libs.F$Promise$PromiseActor.onReceive(F.java:425) ~[play_2.10.jar:2.1.4]
    at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167) ~[akka-actor_2.10-2.2.0.jar:2.2.0]
    at akka.actor.ActorCell.receiveMessage(ActorCell.scala:498) ~[akka-actor_2.10-2.2.0.jar:2.2.0]
    at akka.actor.ActorCell.invoke(ActorCell.scala:456) ~[akka-actor_2.10-2.2.0.jar:2.2.0]

这很奇怪，我没有修改任何东西，是因为我在使用新的securesocial吗？ 起初，我收到了如下警告：

[warn] potential incompatible ....
[warn] org.scala-lang: 2.10.2, 2.10.0

然后，我在Build.scala中添加了以下行：

"securesocial" %% "securesocial" % "master-SNAPSHOT" exclude("org.scala-lang", "scala-reflect"),

---

警告消失。

您必须升级到Play 2.2，由于Scala版本不同，新的securesocial插件与Play 2.1不兼容。如果你完全排除了Scala的东西，那么它就不能使用它可能需要的Scala类。